
At a Glance
Four facts to hold on to.
Water towers
Snow and glaciers feed major rivers.
Fragile
Steep slopes, thin soils.
Tourism
Needs limits, waste systems, local benefit.
Repair
EIA, ESZ, native planting, NMSHE.
In this lesson
How a Mountain Ecosystem Works
Why mountains are fragile
- Higher places are colder. Rain and snow change with height and slope side.
- Forests, shrubs, grasslands and snow may form bands. The order differs on every mountain.
- Steep slopes give loose soil little room to stay. Mountain soils can be thin and slow to form.
- Roots help hold soil. They cannot stop a slide caused by weak rock or heavy rain.
- A road cut changes slope support and drainage.
- Source: IPCC AR6, mountain chapter.
Water towers and wildlife homes
- Snow and glaciers store frozen water. Rain, springs and wetlands also feed streams.
- Himalayan headwaters support the Indus, Ganga and Brahmaputra systems.
- The share from ice versus rain differs by basin and season.
- Some plants and animals live only in small mountain areas.
- Damage to a spring can hurt a village long after visitors leave.
- Source: Department of Science and Technology.
Linked parts of a slope
- High land: snow, rain, rock.
- Slope: soil, roots, roads.
- Stream: runoff and springs.
- Valley: homes, farms, wildlife.
True or False: Himalayan meltwater feeds the Ganga, Indus and Brahmaputra river systems.
What Tourism Changes
One busy tourist day
- Cars add traffic, fumes, noise and parking demand.
- Hotels need water and produce sewage. A village may lack treatment.
- Walkers widen muddy trails. Many steps crush plants and expose soil.
- Plastic and food waste attracts animals and can wash into streams.
- Harm depends on design, visitor numbers and management.
- Source: NITI Aayog, 2018 Himalayan report.
Valley of Flowers example
- The Valley of Flowers is a protected highland site in Uttarakhand.
- The G. B. Pant National Institute of Himalayan Environment studied waste along such trek routes, including Valley of Flowers–Hemkund Sahib.
- A trail needs bins, sorting, collection and a way to carry waste out.
- Local guides help, but need fair pay and clear duties.
- The findings describe their study period, not today’s waste total.
- Source: GBPNIHE case studies.
Ecotourism versus nature tourism
| Nature tourism | Ecotourism done well |
|---|---|
| Visitors go to a forest, lake or mountain | Travel is planned to protect nature and respect local people |
| Income may leave the area | Guides, homestays and workers share benefits |
| Waste and water use may go unchecked | Impacts are measured and rules change when needed |
- A green label alone does not prove low impact.
- India’s 2021 forest-ecotourism guidance stresses local participation. Source: MoEFCC.
Carrying capacity
- It asks how much use a place can bear without unacceptable harm.
- It is not one fixed number for every season.
- Water supply, trail width, weather and waste services change it.
- Time slots, marked paths or fewer vehicles can help.
- Limits can cut local earnings. Communities should help set the rules.
- Source: UN Environment mountain-tourism guide.
True or False: Tourism only affects trails and campsites, not local water supply or wildlife.
Protect and Restore
Prevent before repairing
- Avoid building on the most hazardous or valuable sites.
- An EIA can test alternatives before a covered project gets clearance.
- Eco-sensitive zones regulate some activities near protected areas. Rules depend on each notification.
- Commercial mining and quarrying are generally prohibited in these zones. Local livelihoods are not all banned.
- Source: MoEFCC, ESZ guide.
- Road builders must manage cut slopes and drains.
Repair damage
- Close a badly eroded shortcut. Repair the main trail.
- Plant suitable native species. A plantation is not right for every alpine meadow.
- Protect spring catchments. Keep sewage out of streams.
- Sort waste near its source. Carry non-recyclables out of fragile areas.
- Track plant survival, clear drains, stable slopes and clean water.
- Source: UN report on mountain waste.
Climate raises the stakes
- Warming is shrinking many glaciers.
- Heavy rain and unstable slopes raise flood and landslide risk.
- A glacier lake can release water suddenly. Danger differs by lake.
- Not every landslide is caused by climate change. Geology and road cuts matter too.
- Source: IPCC AR6.
Who acts in India?
- State forest and tourism bodies manage many visitor sites.
- Local bodies handle water and waste.
- Protected-area managers set site rules.
- NMSHE supports research and climate planning. It is one of eight missions in the 2008 National Action Plan on Climate Change.
- NMSHE is not a permit office for every hotel or road.
Think it through: why does a strict EIA matter more in mountains than on a flat plain?
It tests how a project changes slope support, drainage and streams. Effects travel downhill. It can compare safer sites before work starts. Lowlands need care too, with different risks.
True or False: NMSHE is one of eight missions under India’s National Action Plan on Climate Change.
True or False: Eco-sensitive zone notification has no real effect on activity near protected areas.
True or False: Mining and quarrying have little effect on mountain slope stability.
Previous Year Questions
UPSC Mains 2019 asked about restoring mountains.
- UPSC Mains 2019, GS I, Q15The question asks how mountain ecosystems can be restored after harm from development and tourism. Start with the pressure chain. Then cover site planning, safer roads, visitor management, water, waste and habitat repair. Show local sharing of decisions and benefits. Name a way to test the repair. A list of threats alone does not answer a “how” question. View the question.
True or False: UPSC Mains 2019 asked for restoration measures, not just a list of problems.
Quick Q&A
Water tower?
Snow and glaciers feed rivers.
Ecotourism?
Planned, local benefit.
ESZ bans?
Commercial mining.
NMSHE under?
NAPCC, DST.
Mains 2019 asks?
How to restore.
🎲 Practice: Mountain Ecosystems and Ecotourism
4 verified questions from this topic.
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